Try master instead of v0.3.1, add test class

Author: phrdang

.github/workflows/java-checkstyle.yml

@@ -19,7 +19,7 @@ jobs:
         java-version: '12.x'
 
     - name: Run checkstyle with reviewdog
-      uses: nikitasavinov/checkstyle-action@v0.3.1
+      uses: nikitasavinov/checkstyle-action@master
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         # submit review comments based on reviewdog findings

src/com/codefortomorrow/Test.java

@@ -0,0 +1,13 @@
+package com.codefortomorrow;
+
+public class Test {
+    public static void main(String[] args) {
+        System.out.println("Testing");
+    }
+
+    public static void test() {
+        System.out.println("Testing");
+        System.out.println("Testing");
+        System.out.println("Testing");
+    }
+}